Telephone attachment.



No. 861,459. PATBNTED JULY 30,1907. H. GROSS.

TBLEPHONB'ATTAGHMBNT.

APPLICATION FILED MAY 9, 1906.

/NVENTOH W/TNESSES OFFIOE.

HENRY GROSS, OF NEW YORK, N. Y.

TELEPHONE ATTACHIVIENT.

Specification of Letters Patent.

Patented July 30, 1907.

Application filed `May 9,1906. Serial No. 315,928.

To all whom 'it may concern:

Be it known that I, HENRY Gnoss, a citizen of the United States,residing at New York, in the county of New York and State of New York,have invented new and useful Improvements in Telephone Attachments, ofwhich the following is a specification.

My invention relates to attachments to telephones and more particularlyto mouth pieces for telephones, and the principal object of the same isto provide means for closing the mouth piece temporarily during aninterview to prevent the party at the other end of the wire from hearingconversation which may take place during the suspension of theinterview.

In the drawings forming a part of this application and accompanyingsame, Figure l is a side view of the upper part of the portabletelephone transmitter partly in section and provided with my attachment.Fig. 2 is a front view of the same. Fig. 3 is a similar view but withthe parts occupying a different position.

In the threaded opening 5 in the front plate 6 of the transmitterwherein the usual mouth piece is secured, a threaded tube or hub '7,Which is part of a substantially rectangular frame 8, is screwed. Thisframe 8 is provided on its front face with lips 9 around its edge andpreferably on the upper and lower sides, the said Alips forming groovesin which plays a plate l0 also having a perforation or opening Ilconcentric with the mouth piece l2 which is secured to said plate. Thedevice may be constructed of hard rubber such as is usually employed inthe construction of the parts ot telephone instruments, or if founddesirable may be made of metal and suitably ornamented. As shown in Fig.2 the device is in position for use and it is possible for any one tospeak into the transmitter without interference, but in Fig. 3 I haveshown the slide l0 shifted to one side of the frame 8 so that theopening of the transmitter is closed by one end of the plate and themouth piece l2 is also obstructed by one end of the frame 9, so that incase the person using the transmitter desires to temporarily suspend hisconversation and Wishes to prevent the party at the other end of thewire from hearing what conversation might take place during the saidsuspension of conversation it is only necessary for the talker to slidethe mouth piece to the position shown in Fig. 3, and when he desires toresume his talk he slides it to the position shown in Fig. 2 when thereis no obstruction of the transmitter.

It is obvious that minor modifications may be made in the constructionof the device without departing from the essential features as shown andabove dcscribed.

I-Iaving described my invention what I claim as new and desire to secureby Letters Patent is:

The herein described attachment for telephone mouth pieces comprising atrame attached to the transmitter by a threaded connection with the edgeof the central opening of the said transmitter and provided with guidelips and an intermediate groove, a mouth piece connected to a slidemounted to move in said groove, said slide having an opening in linewith the month piece, and an iinperforate portion adapted to cover `thecentral opening in the transmit ter, substantially as described.

In testimony whereof, I ailix my signature in presence of two witnesses.

HENRY GROSS.

Witnesses JAMES F. DUHAMEL, M. W. CLINTON.

